Pronunciation: [pa͡ɪˈiːsɪs] (IPA)
Correct spelling for the English word "pyesis" is [pa͡ɪˈiːsɪs], [paɪˈiːsɪs], [p_aɪ_ˈiː_s_ɪ_s] (IPA phonetic alphabet).
Pyosis.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Correct spelling for pyesis